Await asyncData if `ssr: false`

Editor assessment

The subject states the conditional behavior exactly — asyncData is awaited when `ssr: false` — so the header communicates the fix, its condition, and its beneficiary without the diff, and fix(nuxt) classifies and locates it correctly. Hygiene is clean: imperative mood, no trailing period, sensible length, no ticket junk. No body is needed for a contained rendering-flow fix, and no footer is required. A line on the symptom, missing data on client-rendered pages, would add depth; the message is already clear, accurate, and publishable.